1. Mug up on your external examiner's published work. Try to preface every answer with "Well, as you yourself showed in 1992 ... ?
2. If faced with a difficult question, give a nervous self -deprecating smile, look briefly at your feet, act as if you have been caught on the hop and are forced to improvise. Then launch into your well-prepared answer.
3. If told you have not sufficiently replicated your findings to permit any degree of statistical confidence, reply :
(d) Give the external examiners your autograph when requested.
Write " An appreciative Dr. Brian May " on photographs of yourself, floodlit on the roof of Buckingham Palace which you just happened to be keeping in your wallet...